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Water system · PWSID NC0332010

DURHAM, CITY OF

DURHAM, NC · ~322,083 people served

Check your exact address → DURHAM overview

Good

PurityRadar safety score

PWSID

NC0332010

State

North Carolina

City

DURHAM

Population served

322,083

Primary source

Surface water

Score history

▼ 27 points — the score moved from 100 to 73 on Jun 18, 2026, as newly published EPA data was incorporated.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 73

2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.

PFAS & contaminant readings

Latest detections from EPA’s UCMR5 monitoring (through Nov 2023). Levels in parts per trillion (ppt).

PFOS

Perfluorooctanesulfonic acid

5.6 ppt

limit 4 ppt

Above EPA limit · 1.4×

PFOA

Perfluorooctanoic acid

4.1 ppt

limit 4 ppt

Above EPA limit · 1.0×

PFBS

5.6 ppt

limit —

No federal limit

PFBA

5.2 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2023. Official EPA record →

Reporting · Lead & Copper Rule began Feb 2023 Resolved

Other · EPA contaminant 7000 began Jul 2021 Resolved

Other · EPA contaminant 7000 began Jul 2020 Resolved

Monitoring & reporting · EPA contaminant 0300 began Jun 2018 Resolved

Monitoring & reporting · Total coliform began Sep 2015 Resolved

Monitoring & reporting · EPA contaminant 2979 began Jul 2011 Resolved

Monitoring & reporting · EPA contaminant 2977 began Jul 2011 Resolved

Monitoring & reporting · EPA contaminant 2980 began Jul 2011 Resolved

Monitoring & reporting · EPA contaminant 2964 began Jul 2011 Resolved

Monitoring & reporting · EPA contaminant 2955 began Jul 2011 Resolved

Monitoring & reporting · EPA contaminant 2976 began Jul 2011 Resolved

Monitoring & reporting · EPA contaminant 2968 began Jul 2011 Resolved

Recent enforcement actions

State action · SIF Oct 2023
State action · SFJ Mar 2023
State action · SFL Mar 2023
State action · SIE Mar 2023
State action · SOX Feb 2023
State action · SOX Oct 2021
State action · SOX Oct 2020
State action · SIF Oct 2019

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Manganese

2 stations · latest Dec 2023

198 · max 7,880 ug/l · 121

Fluoride

3 stations · latest Oct 2023

0.05 · max 0.08 mg/l · 60

Copper

1 station · latest Sep 2025

3.8 · max 7.8 ug/L · 15

Lead

1 station · latest Jul 2025

3.7 · max 6.6 ug/L · 3

Nitrate

1 station · latest Aug 2023

0.0115 · max 0.019 mg/L · 2

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system NC0332010 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.